Collapsible buildings



Nov. 15, 1966 H. c. BOLT 3,284,966

COLLAPSIBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 1 IA/l/EA/T'oR HA RRY COLLETT 601-7 Arron/ME) NOV. 15, 1966 c, L 3,284,966

COLLAPSIBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 2 71 I A/ vs n/TOR HA R n 1 Com 57'7' [3 041 A TTORA/E) Nov. 15, 1966 H. c. BOLT 3,284,966

COLLAPS IBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 5 IN VE/VTOR HARRY COLAE'TT 601.7

ATTORNEY Nov. 15, 1966 H. c. BOLT COLLAPSIBLE BUILDINGS 8 Sheets-Sheet 4 Original Filed July 16, 1959 FIG. 6.

INVENTOR HARAY cOl-LETT 6OLT 3) Arron/var Nov. 15, 1966 H. c. sou 3,284,966

COLLAPS IBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 5 FIG. 7.

INVENTOR.

HARRY COLLEITT 801.7

\ ATToRn/ r Nov. 15, 1966 H. c. BOLT 3,284,966

COLLAPSIBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 6 fi;*"""""""'"""" ";fl

INVEA/TQR HARR Y COLLETT' Bour' ATTORNEY Nov. 15, 1966 H. c. BOLT 3,284,966

COLLAPSIBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 7 ATTORNEY Nov. 15, 1966 H. c. BOLT 3,284,966

' GOLLAPSIBLE BUILDINGS Original Filed July 16, 1959 8 Sheets-Sheet 8 FIG. 13.

IA/VENTOR HARRY COLLETT 50m" rlrToml/er United States Patent 3,284,966 COLLAPSIBLE BUILDINGS Harry Collett Bolt, London, England, assignor to Terrapin (Overseas) Limited, London, England Continuation of application Ser. No. 827,516, July 16, 1959. This application Dec. 5, 1963, Ser. No. 328,389 12 Claims. (Cl. 52-16) This application is a continuation of my co-pending application Serial No. 827,516 filed July 16, 1959 and now abandoned.

This invention relates to buildings which can be factory made ready for speedy assembly on any desired site and which can be easily dismounted, packed on lorries and moved to another site and readily re-erected.

This earlier application disclosed buildings assembled from a plurality of units arranged side by-side or end-toend, and each of which comprised a one-piece floor member of greater length than width, end frames movably connected to the floor so that they can be laid flat on the floor and a one-piece roof member of approximately the same length and width as the floor member, which roof member is supported by the end frames when these are upright. In such buildings as heretofore made the roofs were arched and rain-water valleys were provided between the ends of adjacent roofs. Also the arched roofs were of the same area as the floors os that the overall packed height of each building in collapsed condition was such that only two of them could be stacked one upon the other for transport and even this involved the use of a cradle to hold the upper building steady.

Furthermore specifically the end frames were pivoted to the floor.

According to one aspect of the present invention there is provided a building structure capable of being collapsed into a readily transportable condition and into a readily erected condition comprising a floor member of greater length than width, rigid post member disposed at each corner of said floor member, each post member having a length less than half the length of said floor member, means movably connecting said post members to said floor member so that said post members lie on said floor member end-to-end and parallel with the long sides of the floor member without overlapping in said collapsed condition and vertically disposed with respect to said floor member when in said erected position, and a roof member of slightly greater length and width than said floor member and having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially fiat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said fiat rigid roof defining a rectangular recess for receiving the lower part of the floor member of another building structure stacked thereupon.

According to a further aspect of the invention the uprights are pivotally attached to the roof member whereby they can be collapsed on to the floor member.

The roof member may be formed with upstanding edges so that the whole of the top forms a large rectangular recess adapted to receive the lower part of the fioor of the building stacked upon it. This gives added weatherproofing during storage and transport and fixes the buildings against lateral and longitudinal displacement so that special cradles for this purpose are obviated.

The recessed roof may have the upper surface slightly inclined towards one side where a rain hole is provided at one or each end which leads to a pipe that extends 3,284,966 Patented Nov. 15, 1966 through the roof. If adjacent erected buildings are provided with these rain holes adjacent each other, they may drain into a common rain pipe.

The invention will now be further described by way of example with reference to a constructional form thereof illustrated in the accompanying diagrammatic drawings where:

FIGURE 1 is a sectional view of one end of a building unit made in accordance with the invention;

FIGURE 2 is a transverse sectional view of part of the roof;

FIGURE 3 is a vertical sectional view of the roof with adjacent drain and supporting parts;

FIGURE 4 is a sectional view showing the junction of two building units;

FIGURE 5 is a side elevation of four stacked building units;

FIGURE 6 is an enlarged view of part of FIGURE 5;

FIGURE 7 is a sectional view on the line 77 on F-IG URE 5;

FIGURE 8 is a sectional view show-ing a modified form of roof locating device;

FIGURES 9 and 10 show a further modified form of roof locating and fixing device;

FIGURES l1 and 13 show modified methods of fixing the end uprights; and

FIGURE 12 shows the assembly of several units to make a complete building.

Each building unit comprises a floor member 10 having two end pairs of uprights or corner posts 11, 12 pivotally attached thereto at opposite ends thereof so as to be capable of being moved into the upright positions or laid flat on the floor member for transport. For this purpose the length of the floor member must be more than twice the height of the end uprights and in practice must also be of greater length than width. These units each have a roof member 13 fixed to the top of the uprights. Any number of these units can be fixed together end to end and/or side 'by side to form a building of any required floor area. The floor members of these units are slightly spaced apart as at 14 and the spaces covered by boards.

The floor member is built up from a number of parts all fixed together so as to form in effect substantially a single piece. The floor consists of two side beams. such as 15, connected together by two end beams, all these beams being connected together by floor panels.

The floor panels each consist of a floor board 22 fixed on to beams 23 which are closed underneath by a cover board 26. The panels seat on blocks 25 (FIGURE 2) fixed on the beams. This makes a structure which can be for example 24 feet long and 8 feet wide and can carry the full weight of the Walls, floor and eventual contents.

At each corner of the floor there is a metal U-shaped hinge bracket 28 which is bolted by bolts 29 to the side beams 15. These brackets 28 serve as cradles to receive the end uprights 11, 12 which are attached to the brackets 28 by hinge pins 30 whereby the end uprights can be erected or folded flat on to the floor member. When the end uprights are erected they are held erect by inserting pins 31, 32.

The end uprights 11, 12 support the roof and may be left open where walls or partitions are not required or provided with a frame (FIGURE 6) containing glass, opaque panels, doors or other required coverings.

The roof consists of side beams 40, connected together by end boards 42, 43 and plywood or other sheet material 46. The side beams consist of frames 47 covered on both sides with sheet material 48, 49. These side beams have support rails 50 (FIGURE 7) secured to their inner faces at some distance below their upper edges and at a larger distance above their lower edges. Panels are placed on the rails 50, these panels consisting of frames 51 covered by sheet material 52, 53 top and bottom and carrying rails or blocks 54 that rest on the rails 50. These panels constitute themain structural connection between the side beams 40, 41 and end boards 43 and sheet material 46. A roofing felt 56 is then fixed over the complete roof member. The underneath edges of adjacent roof members are closed by strip 57. The roof member thus forms an open box from the sheet 53 down to its lower edges and an open tray from 56 to its upper ed es.

ISrackets 60 are fixed to the roof at each of the four lower corners thereof and these have a pair of recesses 61 in the lower edges which engage a pair of bolts 62 carried by the end uprights 11, 12. These'bolts also pass through metal plates 64. The brackets 60 carry pins that enter holes in the plates 64 to secure the roof firmly in position.

The upper part of the roof forms in effect a tray with upstanding edges so that When a number of the building units are secured together the complete roof is constituted by a series of trays. The tray has a slight incline down to one side where it has a rain hole 68 connected by pipes 69 that pass through the roof member to a drain pipe 70. At the adjacent parts of two units the rain holes 68 may be arranged adjacent each other with their pipes 69 leading to a common drain box 71 carried by the drain pipe 7 0.

The upper edges of the roof member carries F-section metal strips having their flanges 73 facing inwardly and the base 74 vertical so that the base parts of strips on adjacent buildings will be against each other and a strip of metal 75 may be placed over them and crimped around the upper flanges 73 thus providing waterproofing in a very simple and speedy manner. The F-section has its base extended downwards to lie against the wall of the roof member. The lower of the two flanges 73 is also fixed to the roof.

As more easily seen in FIGURES 5, 6 and 7 the size of the roof member in area and depth of underneath recess is such that it seats like a cap over the collapsed uprights 11, 12 and over part of the depth of the floor member whereby a weatherproofing is achieved during transit and lateral and longitudinal displacement of the roof member is prevented.

The depth of the roof and recess is such that the roofs of adjacent superimposed stacked buildings are spaced apart to the extent of about a third or half of the depth of a floor and in this space brackets are provided for facilitating the lifting of the roof, floor and end uprights by a crane. At each long side of the building unit two sets of brackets are provided suitably spaced apart, viz a floor bracket 80 and a roof bracket 81. The floor bracket has seven parts, viz first a base plate having a bolt hole in it and two upstanding walls having outwardly extending flanges parallel to the base plate and also having bolt holes therein; and two wings in a common vertical plane having holes in them by which the brackets are permanently fixed to the floor. The roof bracket is similar but if desired omitting the wings and having its flanges bolted by small bolts 87 (FIGURE 7) to thefioor bracket flanges when stacked. The brackets form a kind of open box and long bolts 82 pass through the hole in the base plate of the floor bracket 80. The bolts 82 of the uppermost unit serve to fix a lifting device 84 which carries lifting rings 85. When the building is to be lifted off a lorry, crane hooks are attached to the rings. The building is then lifted off the lorry and placed on the site. The roof is then to be lifted and for this purpose the small bolts 87 are removed and the roof is lifted. The pivoted end uprights 11, 12 are then raised to the vertical positions and the roof is lowered by the crane on to the uprights and fixed by the brackets 60.

Loose blocks 88 are provided between stacked units. These loose blocks are merely packing pieces to prevent the floor bracket 80 from damaging the roof covering of the unit below it.

Instead of the brackets 60, the roof and end uprights all carry conical members, one of which on the roof at each corner fits the other on the adjacent end upright, means being provided for fixing the cones together Thus as shown in FIGURE 8 the roof may carry an inverted hollow cone 90 that seats in a cone 91 carried by an arm 92 pivoted at 93 on a bracket 94 that is secured on the upper end of the end uprights 11, 12. The cones may have transverse slots 95 into which a tapering key can be driven in order to bring the cones into tight frictional engagement. Vertical and lateral loads are then taken up mainly by the frictionally engaged conical surfaces. By conical we also include frusto conical.

In the modification shown in FIGURES 9 and 10 each end upright has an inverted V-shaped upper end 100 a short distance below which the upright is slotted on opposite sides to receive the legs 101, 102 of a U-shaped connecting member which can be retained on the upright by screw 103. The screw 103 is screwed back to enable the legs 101, 2102 to be drawn clear of the roof and bracket when lowering the roof on to the uprights. After the upright has been raised the ends of the legs 101, 102 (which project outwardly from the uprights) are driven into a box-like bracket 105 that is housed in a recess in the inside of the vertical walls of the roof member. The legs 101, 102 are cham fered at 106 so that as they enter the bracket they are pinched on to the upright. The legs are also chamfered at 107 so as to wedge the brackets downwards and draw the roof member down with the brackets seating tightly on the upper ends 100.

FIGURE .11 shows an arrangement in which the end uprights 11, 12 instead of being pivotally attached to the floor member 10 are pivoted on axes 110, 111 to the roof member 13, these axes being near to and parallel to the ends of the roof member so that the end uprights can be folded flat within the roof member into the plane of said axes.

The lower ends of the end uprights instead of being pivoted to the floor member 10 may be made to drop into sockets on the floor member. For example, the floor member may have fixed to it at each of its four corners, and upstanding therefrom, one element of spigot and socket device, the other element of which is fixed on the end upright. Thus as shown in FIGURE 13 the end upright 36 may be of reduced size at its lower end forming a spigot and fittedwit-h a metal shoe 114 which enters a metal socket 115 on the floor beam 16. A bolt 116 passes through the bottom of the socket and through the beam 16 and through a metal washer :117 and fixes the socket in position. A flange 118 on the upper edges of the shoe seats on the upper edges of the socket and a fixing bolt 119 passes through the socket, shoe and up right 36. If desired, the lower ends of the walls may be fitted with detachable wheels or rollers to facilitate gradual raising or collapsing of the walls.

I claim:

1. A building structure capable of being collapsed into a readily transportable condition and into a readily erected condition comprising a floor member of greater length than width, rigid post members disposed at each corner-of said floor member, each post member having a length less than half the length of said floor member, means movab'ly connecting said post members to said floor member so that said post members lie on said floor member end-to-end and parallel with the long sides of the floor member With-out overlapping in said collapsed condition and vertically disposed with respect to said floor member when in said erected position, and a roof member of slightly greater length and Width than said floor member and having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said fiat rigid roof defining a rectangular recess for receiving the lower :part of the floor member of another building structure stacked thereupon.

2. A building structure as claimed in claim 1 having four brackets fixed to the roof member one at each corner thereof, U-shaped members fixed to each post member at the upper end thereof, the legs of the U-shaped members extend-ing horizontal-1y when the structure is in said erected condition; the brackets having openings therein engaged by the U-shaped members.

3. A building structure including a plurality of substructures, each substructure capable of being collapsed into a readily transportable condition and into .a readily erected condition comprising a floor member of greater length than width, rigid post members disposed at each corner of said floor member, said post member having a length less than half the length of said floor member, means movably connecting said post members to said floor member so that said post members lie on said floor member end-to-end and parallel with the long sides of the floor member without overlapping in said collapsed condition and vertically disposed with respect to said floor member when in said erected position, a roof member of slightly greater length and Width than said floor member and having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said fiat rigid roof defiining a rectangular recess for receiving the lower part of the floor member of another substructure stacked thereupon, the roof members of the substructures being disposed in juxtaposition, and means connecting the roof members together to form a waterproof connection therebetween.

4. A building structure as claimed in claim 3 wherein two adjacent flat rigid roof members are inclined towards each other and a rain hole is provided in each fiat rigid roof member at the junction of the flat rigid roof member which hole leads to a pipe that extends through each flat rigid roof member.

5. A building structure capable of being collapsed into a readily transportable condition and into a readily erected condition comprising a floor member of greater length than width, a roof member of slightly greater length and width than said floor member, rigid post members disposed at each corner of said roof member, each rigid post member having a length less than half the length of said floor member, and means pivotally connecting said post members to said roof member so that said post members lie on said floor member end to end and parallel with the long sides of said floor member without overlapping in said collapsed condition and vertically disposed with respect to said roof member when in said erected position; said roof member having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said flat rigid roof defining a rectangular recess for receiving the lower part of the floor member of another building structure stacked thereupon.

6. A building structure capable of being collapsed into a readily transportable condition and into a readily erected condition comprising a floor member of greater length than width, a roof member of slightly greater length and width than said floor member, rigid post members having a length less than half the length of said floor member so that said post members lie on said floor member end-to-end and parallel with the long sides of said floor member without overlapping in said collapsed condition, and means to vertically dispose said rigid post members with respect to and at the corners of said roof member and said floor member when in said erected condition, said roof member having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said flat rig-id roof defining a rectangular recess for receiving the lower part of the floor member of another building structure stacked thereupon.

7. A building structure including a plurality of substructures, each substructure capable of being collapsed into a readily transportable condition and into a readily erected condition comprising a floor member of greater length than width, a roof member of slightly greater length and width than said floor member, rigid post members having a length less than half the length of said floor member so that said post members lie on said floor member end-to-end and parallel with the long sides of said floor member without overlapping in said collapsed condition, means to vertically dispose said rigid post members with respect to and at the corners of said roof member and said floor member when in said erected condition, said roof member having vertical walls surrounding a rectangular space which is closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area just large enough to receive said rigid post members and at least the upper part of said floor member in said collapsed condition, said vertical walls of said roof member having edges protruding above said flat rigid roof defining a rectangular recess for receiving the lower part of the floor member of another substructure stacked thereupon, the roof members of the substructure being disposed in juxtaposition, and means connecting the roof members together to form a waterproof connection therebetween.

8. A portable building structural unit for assemblage to form at least a portion of a human habitable readilydemountable building having large floor area, comprising: a substantially-rigid, generally-rectangular, unitary framework floor member of greater length than width and having a substantially plane upper surface extending substantially without interruption from end-to-end and from side-to-side of said member; roof-supporting corner posts; means for detachably securing the lower end of each of said posts to the corresponding corner of said floor memher; a substantially-rigid, generally-rectangular unitary framework weatherproof roof member of at least the same length and width as said floor member and of sufficient strength to require no support intermediate its ends; and means connecting the upper ends of said posts to the corners of said roof member for pivotal movement about transverse axes so that When said securing means is detached said posts can be moved pivotally between a horizontal position wherein the lower ends of the posts face toward each other and the posts lie flat against said floor member upper surface parallel to the length thereof when the roof is lowered over the floor and an upright position wherein said posts are substantially within the rectangular peripheral outline of said floor member when the roof is raised above the floor, said securing means interrupting said floor member upper surface only at said corners thereof, the length of said floor member being greater than twice the height of each of said posts to enable the latter to be moved inwardly towards each other and to lie flat on said floor member without overlapping in order to provide, with said roof member superimposed thereon, a compact collapsed pack of minimum height to facilitate transportation to an erection sit and in which said floor member and posts are covered and protected by said roof member, all of said members being of such a size that said Pack can be lifted as a unit by a crane and transported as a unit over highways by truck.

9. The structure defined in claim 8 in which each roof member includes vertical walls surrounding a rectangular space closed at the upper part thereof by a substantially fiat rigid roof, said rectangular space being open at the bottom and having a depth and internal area large enough to receive the corresponding post members and at least an upper portion of the corresponding floor member when each unit is in its collapsed condition.

10. The structure defined in claim 9 in which each of the vertical walls project above the corresponding flat rigid roof and define, with the latter, a rectangular recess for receiving a lower portion of the floor member of another building unit when the latter is in its collapsed condition.

11. A portable building structural unit for assemblage with similar units to form a human habit-able readily-demountable building having a large floor area comprising: a substantially-rigid, generally-rectangular, unitary framework fioor member of greater length than width and having a substantially plane upper surface extending substan tially without interruption from end-to-end and from sideto-side of said member; roof-supporting corner posts; means for detachably securing the lower end of each of said posts to the corresponding corner of said floor member; a substantially-rigid, generally-rectangular unitary framework weatherproof roof member of :at least the same length and width as said floor member and of sufiicient strength to require no support intermediate its ends; and means connecting the upper ends of said posts to the corners of said roof member for pivotal movement about transverse axes so that when sadi securing means is detached said posts can be moved pivotally between a horizontal position wherein the corresponding post lies fiat against said floor member upper surface panallel to the length thereof and an upright position wherein said post is substantially Within the rectangular peripheral outline of said floor member, said securing means interrupting said floor member upper surface only at said corners thereof, the length of said floor member being greater than twice the height of each of said posts to enable the latter to be moved inwardly towards each other and to lie fiat on said floor member without overlapping in order to provide, with said roof member superimposed thereon, a compact collapsed pack of minimum height to facilitate transportation to an erection site and in which said floor member and posts are covered and protected by said roof mem ber, all of said members being of such a size that said pack can be lifted as a unit by a crane and transported as a unit'over highways by truck, the roof member including vertical walls surrounding a rectangular space closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area large enough to receive the post members and at least an upper portion of the floor member when the unit is in its collapsed condition, the vertical walls projecting above the flat rigid roof and defining, with the latter, a rectangular recess for receiving a 6 building comprising a plurality of portable building structural units of substantially identical over-all dimensions, each of said units comprising a substantially-rigid, generally-rectangular unitary framework floor member of great length and width and having a substantially plane upper surface extending substantially with uninterruption from end-to-end and from side-to-side of said member; roof-supporting corner posts; means detachably securing the lower end of eachof said posts to the corresponding corner of said floor member, said posts and said securing means being disposed substantially within the rectangular peripheral outline of said floor member; a substantiallyrigid, generally-rectangular unitary framework weatherproof roof member of at least the same length and width as said floor member and of sufficient strength to require no support intermediate its end; and means connecting the upper ends of said posts to the corners of said roof member for pivotal movement about transverse axes so that when said securing means is detached said posts can be moved pivotally to a horizontal position wherein said posts lie flat against said floor member upper surface parallel to the length thereof, the length of said floor member being greater than twice the height of each of said posts to enable the latter to be moved inwardly towards each other and to lie flat on said floor member without overlapping in order to provide, with said roof member in a lowered superimposed position thereon, a compact collapsed pack of minimum height to facilitate transportation to an erection site and in which said floor member and posts are covered and protected by said roof member, all of said members being of such a size that said pack can be lifted as a unit by a crane and transported as a unit over highways by truck, said units being positioned in edge-to-edge elation with adjacent edges of a pair of juxtaposed units being of equal dimensions and with the upper surfaces of their floor members in substantially the same plane; and means detachably connecting adjacent portions of like members of adjacent units together, each roof member including vertical walls surrounding a rectangular space closed at the upper part thereof by a substantially flat rigid roof, said rectangular space being open at the bottom and having a depth and internal area large enough to receive the corresponding post members and at least an upper portion of the corresponding floor member when each unit is in its collapsed condition, each of the vertical walls projecting above the corresponding flat rigid roof and defining, with the latter, a rectangular recess for receiving a lower portion of the floor member of another building unit when the latter is in its collapsed condition.

References Cited by the Examiner UNITED STATES PATENTS 929,022 7/ 1909 Rose 220-97 1,095,597 5/1914 ,Ritchie 217-15 1,495,026 5/1924 McGee 296-23 1,998,937 4/ 1935 McGinnis 296-26 X 2,795,014 6/1957 Kelly 296-23 X 2,963,313 12/1960 Bennett 296-26 FOREIGN PATENTS 573,470 1929 Germany.

OTHER REFERENCES Prefabrication, August 1958, pages 444 and 445.

RICHARD W. COOKE, JR., Primary Examiner, J. E. MURTAGH, Assistant Examiner. 

6. A BUILDING STRUCTURE CAPABLE OF BEING COLLAPSED INTO A READILY TRANSPORTABLE CONDITION AND INTO A READILY ERECTED CONDITION COMPRISING A FLOOR MEMBER OF GREATER LENGTH THAN WIDTH, A ROOF MEMBER OF SLIGHTLY GREATER LENGTH AND WIDTH THAN SAID FLOOR MEMBER, RIGID POST MEMBERS HAVING A LENGTH LESS THAN HALF THE LENGTH OF SAID FLOOR MEMBER SO THAT SAID POST MEMBERS LIE ON SAID FLOOR MEMBER END-TO-END AND PARALLEL WITH THE LONG SIDES OF SAID FLOOR MEMBER WITHOUT OVERLAPPING IN SAID COLLAPSED CONDITION, AND MEANS TO VERTICALLY DISPOSE SAID RIGID POST MEMBERS WITH RESPECT TO AND AT THE CORNERS OF SAID ROOF MEMBER AND SAID FLOOR MEMBER WHEN IN SAID ERECTED CONDITION, SAID ROOF MEMBER HAVING VERTICAL WALLS SURROUNDING A RECTANGULAR SPACE WHICH IS CLOSED AT THE UPPER PART THEREOF BY A SUBSTANTIALLY FLAT RIGID ROOF, SAID RECTANGULAR SPACE BEING OPEN AT THE BOTTOM AND HAVING A DEPTH AND INTERNAL AREA JUST LARGE ENOUGH TO RECEIVE SAID RIGID POST MEMBERS AND AT LEAST THE UPPER PART OF SAID FLOOR MEMBER IN SAID COLLAPSED CONDITION, SAID VERTICAL WALLS OF SAID ROOF MEMBER HAVING EDGES PROTRUDING ABOVE SAID FLAT RIGID ROOF DEFINING A RECTANGULAR RECESS FOR RECEIVING THE LOWER PART OF THE FLOOR MEMBER OF ANOTHER BUILDING STRUCTURE STACKED THEREUPON. 